11.8: Examen de Aptitud
- Page ID
- 112211
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\(\newcommand{\avec}{\mathbf a}\) \(\newcommand{\bvec}{\mathbf b}\) \(\newcommand{\cvec}{\mathbf c}\) \(\newcommand{\dvec}{\mathbf d}\) \(\newcommand{\dtil}{\widetilde{\mathbf d}}\) \(\newcommand{\evec}{\mathbf e}\) \(\newcommand{\fvec}{\mathbf f}\) \(\newcommand{\nvec}{\mathbf n}\) \(\newcommand{\pvec}{\mathbf p}\) \(\newcommand{\qvec}{\mathbf q}\) \(\newcommand{\svec}{\mathbf s}\) \(\newcommand{\tvec}{\mathbf t}\) \(\newcommand{\uvec}{\mathbf u}\) \(\newcommand{\vvec}{\mathbf v}\) \(\newcommand{\wvec}{\mathbf w}\) \(\newcommand{\xvec}{\mathbf x}\) \(\newcommand{\yvec}{\mathbf y}\) \(\newcommand{\zvec}{\mathbf z}\) \(\newcommand{\rvec}{\mathbf r}\) \(\newcommand{\mvec}{\mathbf m}\) \(\newcommand{\zerovec}{\mathbf 0}\) \(\newcommand{\onevec}{\mathbf 1}\) \(\newcommand{\real}{\mathbb R}\) \(\newcommand{\twovec}[2]{\left[\begin{array}{r}#1 \\ #2 \end{array}\right]}\) \(\newcommand{\ctwovec}[2]{\left[\begin{array}{c}#1 \\ #2 \end{array}\right]}\) \(\newcommand{\threevec}[3]{\left[\begin{array}{r}#1 \\ #2 \\ #3 \end{array}\right]}\) \(\newcommand{\cthreevec}[3]{\left[\begin{array}{c}#1 \\ #2 \\ #3 \end{array}\right]}\) \(\newcommand{\fourvec}[4]{\left[\begin{array}{r}#1 \\ #2 \\ #3 \\ #4 \end{array}\right]}\) \(\newcommand{\cfourvec}[4]{\left[\begin{array}{c}#1 \\ #2 \\ #3 \\ #4 \end{array}\right]}\) \(\newcommand{\fivevec}[5]{\left[\begin{array}{r}#1 \\ #2 \\ #3 \\ #4 \\ #5 \\ \end{array}\right]}\) \(\newcommand{\cfivevec}[5]{\left[\begin{array}{c}#1 \\ #2 \\ #3 \\ #4 \\ #5 \\ \end{array}\right]}\) \(\newcommand{\mattwo}[4]{\left[\begin{array}{rr}#1 \amp #2 \\ #3 \amp #4 \\ \end{array}\right]}\) \(\newcommand{\laspan}[1]{\text{Span}\{#1\}}\) \(\newcommand{\bcal}{\cal B}\) \(\newcommand{\ccal}{\cal C}\) \(\newcommand{\scal}{\cal S}\) \(\newcommand{\wcal}{\cal W}\) \(\newcommand{\ecal}{\cal E}\) \(\newcommand{\coords}[2]{\left\{#1\right\}_{#2}}\) \(\newcommand{\gray}[1]{\color{gray}{#1}}\) \(\newcommand{\lgray}[1]{\color{lightgray}{#1}}\) \(\newcommand{\rank}{\operatorname{rank}}\) \(\newcommand{\row}{\text{Row}}\) \(\newcommand{\col}{\text{Col}}\) \(\renewcommand{\row}{\text{Row}}\) \(\newcommand{\nul}{\text{Nul}}\) \(\newcommand{\var}{\text{Var}}\) \(\newcommand{\corr}{\text{corr}}\) \(\newcommand{\len}[1]{\left|#1\right|}\) \(\newcommand{\bbar}{\overline{\bvec}}\) \(\newcommand{\bhat}{\widehat{\bvec}}\) \(\newcommand{\bperp}{\bvec^\perp}\) \(\newcommand{\xhat}{\widehat{\xvec}}\) \(\newcommand{\vhat}{\widehat{\vvec}}\) \(\newcommand{\uhat}{\widehat{\uvec}}\) \(\newcommand{\what}{\widehat{\wvec}}\) \(\newcommand{\Sighat}{\widehat{\Sigma}}\) \(\newcommand{\lt}{<}\) \(\newcommand{\gt}{>}\) \(\newcommand{\amp}{&}\) \(\definecolor{fillinmathshade}{gray}{0.9}\)Examen de competencia
Resolver usando gráficos:
\ (\ left\ {\ begin {array} {r}
3x + 2y = 4\\
15x + 10y = -10
\ end {array}\ right.\)
- Contestar
-
inconsistente
Resolver usando gráficos:
\ (\ left\ {\ begin {array} {r}
2x - 3y = 2\\
x + 2y = 8
\ end {array}\ right.\)
- Contestar
-
(4,2)
Resolver usando sustitución:
\ (\ left\ {\ begin {array} {r}
2x + 6y = 16\\
x - 4y = -13
\ end {array}\ right.\)
- Contestar
-
\((−1,3)\)
Resolver usando adición:
\ (\ left\ {\ begin {array} {r}
3x + 8y = -5\\
x - 2y = 3
\ end {array}\ right.\)
- Contestar
-
\((1, -1)\)
Resolver usando sustitución o adición:
\ (\ left\ {\ begin {array} {r}
4x - 4y = 8\\
x - y = 5
\ end {array}\ right.\)
- Contestar
-
inconsistente
Resolver usando sustitución o adición:
\ (\ left\ {\ begin {array} {r}
9x + 3y = 12\\
3x - y = 4
\ end {array}\ right.\)
- Contestar
-
\((\dfrac{4}{3}, 0)\)
La suma de dos números es 43 y la diferencia de los mismos dos números es 7. ¿Cuáles son los números?
- Contestar
-
18 y 25
Un químico necesita 80 ml de una solución ácida al 18%. Tiene dos soluciones ácidas, A y B, para mezclarlas para formar la solución de 80 ml. La solución ácida A es 15% de ácido y la solución ácida B es 20% de ácido. ¿Cuánto de cada solución se debe usar?
- Contestar
-
32 ml de solución A; 48 ml de solución B.
Un parquímetro contiene 32 monedas. Si el medidor contiene solo monedas de cinco centavos y cuartos, y el valor total de las monedas es de $4.60, ¿cuántas de cada tipo de moneda hay?
- Contestar
-
17 níqueles y 15 cuartos
Una persona tiene $15,000 para invertir. Si invierte parte al 8% y el resto al 12%, ¿cuánto debería invertir a cada tasa para producir el mismo rendimiento que si lo hubiera invertido todo al 9%?
- Contestar
-
$11,250 al 8%; $3,750 al 12%